ViewSonic VA1912w-2 User Manual Download

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ViewSonic VA1912w-2

VA1912wb-2

Model No. VS1

0866

19” Color TFT LCD

Display

(VA1912

-2_VA1912wb-2_SM Rev. 1

Aug. 2006)

ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

Service Manual

Summary of Contents for VA1912w-2

Page 1: ...ViewSonic VA1912w 2 VA1912wb 2 Model No VS10866 19 Color TFT LCD Display VA1912w 2_VA1912wb 2_SM Rev 1b Aug 2006 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Service Manual...

Page 2: ...claims any warranty of merchantability or fitness for any particular purpose Further ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents hereo...

Page 3: ...ction Control Description 10 4 Circuit Description 16 5 Adjustment Procedure 17 6 Troubleshooting Flow Chart 37 7 Recommended Spare Parts List 45 8 Exploded Diagram and Exploded Parts List 50 9 Block...

Page 4: ...ops immediately Long contact with water may cause discoloration or spots 4 When the panel surface is soiled wipe it with absorbent cotton or other soft cloth 5 Since the panel is made of glass it may...

Page 5: ...ce of the polarizer Surface of the panel is pressed by fingers this may cause MURA Take out the monitor with cushion Take out the monitor by grasping the LCD panel That may cause MURA Place the monito...

Page 6: ...ode Max Typ 36W max 32W typ Power Consumption Active Off Mode Max 2W Audio Amplifier Speaker 1 5 W 2 5W x 2 Tilt 20 to 5 Yes Swivel No Pivot No Ergonomics Height Adjust No OSD Control X 1 2 Yes Physic...

Page 7: ...nalog Separate Video Impedance 75 Ohms Analog Maximum PC Video Signal 950 mV with no damage to monitor Maximum Mac Video Signal 1250 mV with no damage to monitor Sync Signals TTL DDC 2B Compliant with...

Page 8: ...PE with no damage Power Supply Missing Cycle Immunity Shall be able to function properly without reset or visible screen artifacts when cycle of AC power is randomly missing at nominal input Power Su...

Page 9: ...onfidential Do Not Copy VA1912w 2_VA1912wb 2 Timing Table Item Timing Analog Digital 1 640 x 350 70Hz 31 5kHz Yes No 2 640 x 400 60Hz 31 5kHz Yes No 3 640 x 400 70Hz 31 5kHz Yes No 4 640 x 480 60Hz 31...

Page 10: ...ic operation i e there should be no cycling Reaction Time OSD must fully appear within 0 5s after pushing Button 1 Short Cuts Function from the button s 1 Main Menu 2 Adjust Contrast Brightness or To...

Page 11: ...ck will be activated by pressing the front panel control buttons 1 for 10 seconds Locking the power button means that the user won t be able to turn off the LCD while the power button is locked If the...

Page 12: ...H Signal to Noise Ratio 72 dB Frequency response 300 TO 20KHZ Distortion 8 1kHz Vibration There should be no audible vibration with volume at 100 Input signal within 1 Vrms Screen image There should b...

Page 13: ...Screen Image Use the buttons on the front control panel to display and adjust the OSD controls which display on the screen The OSD controls are explained at the top of the next page and are defined in...

Page 14: ...is screen You can toggle between control screens adjust the selected option or exit the screen 4 To adjust the setting press the up or down buttons 5 To save the adjustments and exit the menu press bu...

Page 15: ...and a User Color mode which allows independent adjustment of red R green G and blue B The factory setting for this product is 6500K 6500 Kelvin 9300K Adds blue to the screen image for cooler white use...

Page 16: ...s user guide for instructions on changing the resolution and refresh rate vertical frequency NOTE VESA 1440 x 900 60Hz recommended means that the resolution is 1440 x 900 and the refresh rate is 60 He...

Page 17: ...e screen image Setup Menu displays the menu shown below Language Select allows the user to choose the language used in the menus and control screens Resolution Notice allows the user to enable or disa...

Page 18: ...le with a 30 second setting if a control is not pushed within 30 seconds the display screen disappears OSD Background allows the user to turn the OSD background On or Off Memory Recall returns the adj...

Page 19: ...for green mode requirements and spread spectrum support for EMI management The TSUM17AK incorporates the world s first coherent oversampled RGB graphics ADC in a monitor controller system The oversam...

Page 20: ...ange 3 Firmware Test Patten Burn in Model Refer to Chap3 Hot Keys for Function Control Make sure the F W is the latest version 4 DCC Test Patten EDID program Make sure it can pass test program 5 Windo...

Page 21: ...Gray_Scale_0 100_V64 Test Signal 1280 1024 60Hz Test Pattern Vertical 64 256 Gray Scale Right Left From 0 to 100 White Inspection Item Line Defect Function Defect 15 Function Test Display pattern Item...

Page 22: ...ViewSonic Corporation Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 19 Confidential Do Not Copy VA1912w 2_VA1912wb 2...

Page 23: ...of Print Port to connect Print Port of PC and Print Port of fixture and EDID burn in the same fixture to connect VGA Cable between D sub of fixture and D sub of AD Board of monitor the monitor must b...

Page 24: ...ash The dialog of figure is displayed Device Type is Pm25LV512 then press Step 4 Press Read then enter as below figure then press to down load the program of BIOS bin If down load BIOS that is success...

Page 25: ...f BIOS Checksum below figure is displayed 0x1626 then press Run to execute the BIOS procedure The BIOS procedure is displayed the message Verify OK that the BIOS procedure is successful Step 6 Press D...

Page 26: ...ViewSonic Corporation Step 7 When select ReConnect and press Run then repeat to connect the mode of ISP into next the action of BIOS procedure 23 Confidential Do Not Copy VA1912w 2_VA1912wb 2...

Page 27: ...tor Figure 1 1 2 Put the monitor in the PE bag and seal the bag with tape Figure 2 1 3 Put the cushions on the monitor Figure 3 1 4 Place the monitor into the carton and then put all the accessories i...

Page 28: ...e Stand Assy 1 1 Remove Stand Cover Step 2 Remove the Stand Cover Step 5 Completed Step 3 Loose and remove 4 screws Step 1 Remove the Seat Assy Step4 Remove the Stand Assy ViewSonic Corporation 25 Con...

Page 29: ...hooks to take Bezel and Rear Cover apart Step 1 Loose and remove 2 screws Step 2 Separate Bezel hooks to take Bezel and Rear Cover apart Step 3 Remove Rear Cover Step 4 Completed ViewSonic Corporatio...

Page 30: ...p 1 Remove FFC from OSD Board Step 2 Loose and remove 4 screws Step 4 Remove 2 pieces of Backlight wires Step 3 Lift up LCD module and remove bezel Step 5 Remove 2 pieces of Backlight wires ViewSonic...

Page 31: ...Step 6 Loose and remove 2 screws Step 7 Loose and remove 2 screws Step 8 Loose and remove 4 screws Step 9 Remove the PCBA Cover ViewSonic Corporation 28 Confidential Do Not Copy VA1912w 2_VA1912wb 2...

Page 32: ...d AD Board Step 1 Loose and remove 4 screws Step 2 Remove Lips Board Step 3 Remove 2 pieces of FFCs Step 4 Remove the FFC Step 5 Loose and remove 4 screws ViewSonic Corporation 29 Confidential Do Not...

Page 33: ...Step 1 Place new AD Board And fasten 4 fixed screws Step 3 Insert FFC Step7 Completed Step 4 Insert 2 pieces of FFCs Step 6 Remove AD PCBA Step 2 Fasten 4 fixed screws ViewSonic Corporation 30 Confide...

Page 34: ...Step 5 Insert new Lips Board Step 6 Fasten 4 fixed screws Step 7 Completed ViewSonic Corporation 31 Confidential Do Not Copy VA1912w 2_VA1912wb 2...

Page 35: ...5 Remove OSD Board Step 1 Separate both Audio Cable Step 2 Take OSD Board apart Step 3 Completed ViewSonic Corporation 32 Confidential Do Not Copy VA1912w 2_VA1912wb 2...

Page 36: ...PCB Heatsink Step 1 Place New OSD Board Step 2 Insert Audio cable to connectors of New OSD Board Step 1 Join the PCB Cover Step 2 Fasten 4 fixed screws Step 3 Completed ViewSonic Corporation 33 Confi...

Page 37: ...ws Step 4 Fasten 2 fixed screws Step 5 Insert 2 pieces of Backlight wires Step 6 Insert 2 pieces of Backlight wires Step 7 Join LCD module and remove bezel ViewSonic Corporation 34 Confidential Do Not...

Page 38: ...mbly Step 10 Completed Step 1 Place Rear Cover Step 2 Fasten 2 fixed screws Step 3 Place the Stand Assy Step 8 Fasten 4 fixed screws Step 9 Insert FFC ViewSonic Corporation 35 Confidential Do Not Copy...

Page 39: ...Step 5 Join the Stand Cover Step 6 Join the Seat Assy Step 7 Completed Step 4 Fasten 4 fixed screws ViewSonic Corporation 36 Confidential Do Not Copy VA1912w 2_VA1912wb 2...

Page 40: ...lysis Repair Testing Flash Dots Bright Dot Dark Dot Backlight Light Leakage Mura Image Sticking Brightness spot Particle Dot Defect Check Panel Light On Test Next Step Panel Change Should be Performed...

Page 41: ...ange Power B Change Check Panel Display Noise Beat Display Shut Down Beat Display Flicker No Backlight Display Wave B Panel Change Adapter Change Check Adapter Panel Change Should be Performed to Leve...

Page 42: ...cklight Check PCBA AD B Change Inverter B Change Power B Change Check Panel Check PCBA Panel Change Power B Change Inverter B Change CNT B Change AD B Change Check PCBA VGA cable DVI cable Check Wire...

Page 43: ...ak Line Next Step TEST NG AD B Change Panel Change Horizontal Band Defect C Vertical Band Defect Power Saving Display Abnormal Check PCBA AD B Change Inverter B Change Power B Change Check PCBA AD B C...

Page 44: ...Change OSD B Change AC Power Change DC Power CNT Cable Change Adapter Change Check Adapter Check PCBA Check Wire OSD Cable Inverter B Power B Change OSD B Change DC Power CNT Cable Change Adapter Chan...

Page 45: ...SD B Change D sub cable VGA cable DVI cable BIOS Update Abnormal Loudspeaker Check PCBA Check Wire AD B Change CNT B Change No Voice Voice Loss Abnormal Loud L R Abnormal L R Same Volume Check Loudspe...

Page 46: ...CNT B Change Other Abnormal Display Next Step TEST NG Complete TV Function Display Abnormal Panel Change Should be Performed to Level 3 Repair Panel Change Check PCBA Check Wire TV B Change AV Cable C...

Page 47: ...de z Fuzzy Image Adjust Phase z Image too bright Adjust brightness and contrast by OSD z Image too dark Adjust brightness and contrast by OSD z Irregular image Check the signal connection between the...

Page 48: ...90A2 H05 76 2 mmx76 2 mm Chang Huang VSC_VA1912w 2 Green II DC 00005604 77 D008326 1 16 MENU for A190E2 H05 Complex 1C Yi Ching VSC_VA1912w 2 Caution Card Green II DC 00005606 76 D008373 AJ0A2T3A25 1...

Page 49: ...47 1 17 SCREW M3 P 0 5 mm L 4 mm HW 00000553 42A9930008 2000 18 Screw M3 P1 27 12 5 5 2 Steel HW 00000556 42A9990005 2000 19 SCREW M4 P 0 7 mm L 15 mm HW 00000590 42A9930013 2000 20 SCREW M4 P 0 7 mm...

Page 50: ...4 26 HW 00000555 42A9930014 Screw M3 P0 5 6 Green I 4 27 HW 00000556 42A9990005 Screw M3 P1 27 12 5 5 2 Steel Green I 2 28 C 00004284 40 D004250 Cover Hinge A190A2 H05 ABS PA757N Black J91A11B5 1 29...

Page 51: ...Unit A190A2 Green I 1 20 C 00005686 41 D003772 Cover AD Assy A190A2 SECC without Dvi D Hole Green II 1 21 B 00006727 35 D008185 PCBA for A190A2 A02 T A190A2 A02 T S1 1208 05 Rev 04 Green II 1 22 CB 0...

Page 52: ...een II 1 49 N A 77 D000114 Customer Label for A170E1 H0G Green IVA712 Ver 2 Green II 1 50 N A 78 D001492 Pallet A150X2 T01 Wooden 1150 mmx840 mmx138 mm Green I 0 02 51 C 00004280 40 D004256 Seat Assy...

Page 53: ...0 D004252 STAND ASSY 1 13 C 00004284 40 D004250 COVER HINGE 1 14 C 00004285 40 D004259 SEAT ASSY 1 EXPLODED PARTS LIST VA1912W 2 EXPLODED PARTS LIST VA1912WB 2 ViewSonic Model Number VS10866 Rev 1a Se...

Page 54: ...1 15 N A Different region refer to BOM Customer Label 1 PACKING PART LIST VA1912W 2 ViewSonic Model Number VS10866 Rev 1a Item ViewSonic P N Ref P N DESCRIPTION Q ty 1 N A VA1912W 2 LCD Monitior 1 2...

Page 55: ...poration 9 Block Diagram OSD Key Pad Audio Out D sub Analog Video Speaker AC Power LDO Main Board LIPS Backlight LCD Module DC 5V 5V Signal Audio In DC 12V 12V 3 3V 52 Confidential Do Not Copy VA1912w...

Page 56: ...KP BSTH VCM_PWM DCDC_ON OFF PANEL_ON OFF INVERTER I F B2 V12A INV_ADJ INV_ON OFF V33C V5A VOL_ADJ AUDIO_ON AUDIOR AUDIOR AUDIOL AUDIOL AUD_DET LED_GL B3 VGA RIN GIN BIN VSYNC GNDR GNDG GNDB DDCA_DAT D...

Page 57: ...DC 97 GPIO_P15 PWM0 69 PWM2 GPIO_P24 78 GPIO_P12 20 RSTN 22 GPIO_P00 SAR1 23 GPIO_P01 SAR2 24 GPIO_P06 27 GPIO_P07 28 GPIO_P13 30 GPIO_P14 31 GPIO_P16 PWM2 35 DDCROM_SDA 76 DDCROM_SCL 77 RST 19 GA2P N...

Page 58: ...P5 1210 4 7u 25V 5 RoHS R13 0603 4 7K 5 RoHS R13 0603 4 7K 5 RoHS R11 0603 10K 5 OPEN R11 0603 10K 5 OPEN LP3 FBMJ2125HS420 PbF LP3 FBMJ2125HS420 PbF R182 0603 10K 5 RoHS R182 0603 10K 5 RoHS R19 0603...

Page 59: ...603 100n 25V 7 RoHS C43 0603 100n 25V 7 RoHS 1 2 D9 B240A F D9 B240A F GND 1 VOUT 2 VIN 3 VOUT 4 U6 LM1117MPX 3 3 RoHS U6 LM1117MPX 3 3 RoHS C45 0603 100n 25V 7 RoHS C45 0603 100n 25V 7 RoHS C53 0603...

Page 60: ...r OPEN C15 0603 1n 16V 7 C15 0603 1n 16V 7 L20 0603 0R 5 RoHS L20 0603 0R 5 RoHS C123 0603 47n 16V 7 RoHS C123 0603 47n 16V 7 RoHS R34 0603 56R 1 R34 0603 56R 1 R78 0603 75R 1 R78 0603 75R 1 D29 06032...

Page 61: ...Z1608S221 RoHS R3 0603 249R 1 RoHS R3 0603 249R 1 RoHS 1 2 L1 MPZ1608S221 RoHS L1 MPZ1608S221 RoHS R4 0603 249R 1 RoHS R4 0603 249R 1 RoHS 7 8 5 3 1 2 4 6 LP7 BK32164M121 LP7 BK32164M121 1 3 2 Q14 TP0...

Page 62: ...2 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 CN1 IL FHR F36S HF RoHS CN1 IL FHR F36S HF RoHS 1 1...

Page 63: ...60 ViewSonic Corporation Confidential Do Not Copy VA1912w 2_VA1912wb 2 11 PCB Layout Diagrams...

Page 64: ...61 ViewSonic Corporation Confidential Do Not Copy VA1912w 2_VA1912wb 2...

Page 65: ...62 ViewSonic Corporation Confidential Do Not Copy VA1912w 2_VA1912wb 2...

Page 66: ...roubleshooting Flow Chart 7 Recommended Spare Parts List 8 Exploded Diagram and Exploded Parts List 9 Block Diagrams 10 Schematic Diagrams 11 PCB Layout Diagrams B Are you satisfied with this Service...

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